RE: Blocking Access to Non-domain computers

From: Steven A. Fletcher (sfletcher_at_integrityts.com)
Date: 08/25/04

  • Next message: Brian Kim: "Re: Internet filtering at the packet level?" 
    Date: Tue, 24 Aug 2004 23:53:56 -0500
To: "Andreas" <andreas@inferno.nadir.org>, <security-basics@securityfocus.com>

    That is the only option I can think of. If you think about it, how
    could you keep non-domain computers from getting an IP address? As far
    as I know, there is no provision in DHCP for such control. For the
    system to determine whether or not to give the machine an address, the
    machine would need to be able to communicate with the domain
    controllers, which would require an IP address for the communication to
    be able to happen.

    Steve Fletcher
    Senior Network Engineer, MCSE (NT4/Win2k), HP Master ASE, CCNA,
    Security+
    Integrity Technology Solutions
    Phone: (309)664-8129
    Toll Free: (888) 764-8100 ext. 129
    Fax: (309) 662-6421
    sfletcher@integrityts.com
     

    -----Original Message-----
    From: Andreas [mailto:andreas@inferno.nadir.org]
    Sent: Monday, August 23, 2004 2:16 PM
    To: security-basics@securityfocus.com
    Subject: Re: Blocking Access to Non-domain computers

    Hello,

    On Thursday 19 August 2004 16:58, Brian Gehrke wrote:
    > I am running a W2K domain, using DHCP. Is it possible to block
    > non-domain computers from getting an IP address from the DHCP server,
    so
    > they will not be able to access the Internet through the network.

    is dhcp by mac address (which of course can easily be spoofed)
    an option?

    regards,
    andreas

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